Endless conveyer of the belt type



Feb. 5, 1952 D. F. PRZYBYLSKI ,2

ENDLESS CONVEYER Of" THE BELT TYPE Original Filed Sept. 23, 1948 K 4. IO 1 v V 6 I l y 0 24 INVENTOR. 7

' F I G. 3 DANIEL F. PRZYBYLSKI ATTORNEY Patented Feb. 5, 1952 ENDLESS CONVEYER OF THE BELT TYPE Daniel F. Przybylski, Winona, Minn. Original application September 23, 1948, Serial No. 50,697. Divided and this application August 23, 1950, Serial No. 180,978

My present invention relates to improvementsin endless conveyors of the belt type intended for general use and especially well adapted for use as a cross-conveyor when embodied inmy pend ing application for patent for ,Trench Excavator, filed September 7, 1948, under Serial Number 48,121.

This application is a division of my pending application filed September 23, 1948, under Serial No. 50,697 entitled Endless Conveyor of. the Belt Type.

An object of this invention is to provide novel means for transversely dishing the upper run of an endless conveyor belt. f

A further object of this invention is to provide novel side members that overlie the longitudinal edge portions of the upper run of an endless conveyor belt.

A still further object of this invention is to provide a novel frame structure for an endless conveyor belt.

. Other objects of this invention will be apparent from the followingv description, reference being had to the drawing.

To the above end, generally stated, the invention consists of the novel devices and combination of devices hereinafter described and defined in the claim.

In the accompanying drawing, which illustrates the invention, like characters indicate like parts throughout the several views.

Referring to the drawing:

Fig. 1 is a fragmentary plan view of an endless conveyor embodying the invention;

Fig. 2 is a fragmentary view partly in side elevation and partly in longitudinal central vertical section; and

Fig. 3 is a view partly in elevation and partly in transverse vertical section taken on the line 3-3 of Fig. 2, on an enlarged scale. I

The numeral 4 indicates a pair of I-beams that may be assumed to be part of the bed of the trench excavator heretofore referred to, or any other suitable structure. These I-beams 4 support a main frame 5 for the endless conveyor. This main frame 5 includes a pair of tubular sills 5 and pairs of short legs 1.

The sills 6 are rigidly connected at a plurality of longitudinally I spaced pointsby crosstie members 8, each of which is an angle bar arranged with its flanges diverging upwardly relative to a vertical plane. The legs! are made of angle bars, one pair resting on each I-beam e and rigidly secured thereto. On the upper ends of the legs 7 are short angle members 9 that are outwardly of 1 Claim. (01. 198-9191) a concavo-convex member III, the concave side of which affords a seat for the adjacent sill 6. The legs of eachpair are rigidly connected at their intermediate portions by a crosstie rod Ill.

A pair of upstanding anchor plates l I is rigidly secured to the sills 6 in the vertical plane of each crosstie member 8. overlying the main frame 5 is a sheet metal deck [2 having downwardly diverging side members [3. This deck 12 and its side members 13 rest on flat bars 14, the ends of which rest on the sills 6 at the inner sides of the anchor plates H and are rigidly secured to both thereof. The deck l2 and its side members l3 also serve as a cover, as will presently appear.

A secondary frame [5 above the main frame 5 comprises, at each anchor plate H, a leg bracket 16. Each leg bracket IB is formed of a fiat bar shaped to form an upright member ll,- an inturnedv horizontal member l8 and an upright and outwardly inclined member [9. The member 18 is on the upper end of the member I! and the member I9 is on the inner end of the member 18. The lower end portions of the member I1 overlap the anchor plates l I on their outer facesand are secured thereto by pairs of nut-equipped bolts 20. ;Each legbracket' 16 further includes a flat brace bar,2 l having one of its ends rigidly secured to the upright member ll and-its other end is rigidly secured to the adjacent side member H! of the deck l2. The brace bars 2| are, downwardly and. inwardly inclined and spaced below the; horizontal member 18.

The leg brackets l6 on, each side, of the secondary frame I5 areall connected by a longitudinally extended flat bar 22 supported on the upper faces of the outwardly and upwardly inclined members IQ of said leg brackets and rigidly secured thereto. A pair of longitudinally extended wood guide rails 23 supported on the brace bars 2| and rigidly secured thereto are provided for supporting the longitudinal edge portions of the 3 portions of said bearings slid-ably engage the sills 6.

Each bearing 30 is normally held in a set position on the respective sills 6.by a take-up device 32. On one end of the driven shaft 29 is a sprocket wheel 33 which may be driven from any suitable source of power, not shown. The sections 23 of the idle pulley 26 are keyed to .a shatt 34 journaled in bearings 35 that are identical with the bearings 30. The take-up devices 36 for the bearings 35 are identical with the take-up" devices 32. v

Pull of the conveyor belt 24 on the pulleys 25 and 26 tends to slide the bearings" 30 and 35' inwardly on the sills 6, but the: take-up devices 32 and 36 overcome this tendency and hold the bearings 3D and 35 Where adjusted on the sills 6 and thus hold the pulleys 25 and 26 with the desired tension on the conveyor belt 24. devices 32 and 36 may be individually operated to angul'arly adjust the pulleys 2.5 and 26.

The upper run of the conveyor belt 24, at its transverse intermediate portion, slidably rests on the deck l2 and the longitudinal edge portions of said belt slidably' rest on the guide rails 23. These guide rails 23 hold the respective portions of the conveyor belt '24 in upwardly diverging relation and thus transversely dish the conveyor belt 2 to facilitate the holding of a load of material thereon. The lower run of the conveyor :2?

belt 24 moves over the crosstie members I 9' of themain frame 5. The deck :2 and its side members [3 serve as a cover for the lower run of the conveyor belt 24 and prevent dirt precipitated from the upper run of said belt from falling thereon and being-carried thereby between the conveyor belt 24 and the idle pulley '26.

The supplemental frame I5 is provided with flexible side members 31, such as strips of belting. These side members 3'1 cover the longi- 1.: tudinal bars 22 to which they are secured, extend downwardly therefrom to the conveyor belt '2 and their lower longitudinal edge-portions are slightly rolled inwardly onto said belt, see-Fig. '3.

These rolled edge portions of the side members a:

The take-up These side members 31 prevent 'ma- These two.-

.ported at their end portions on the bearings 30 and 35, respectively, and are rigidly secured thereto.

The conveyor belt 24 is automatically centered on the pulleys 25 and 26 just before its upper run passes onto the driven pulley 25 by a pair of opposing belt-centering rollers 40. These belt centering rollers Ml arejournal'edon bearings 4| on the scraper bar 38 to turn about axes that a converge transversely over said belt.

During each cycle of the'conveyor belt 24 in its course, the same passes between the inclined belt-centering rollers 40 and is automatically centered thereby relative to the pulleys 25 and 26.

The. drawing illustrates a commercial form of the invention, butit will be understood that the .same is. capable of, certain modifications as to details of construction, arrangement and combination of parts within the scope of the invention herein disclosed.

What I claim is:

In a conveyor of: the class described, a. pair of longitudinal sills, front and: rear pulleys journa led on, the. sills, one of the pulleys being driven, a horizontal deck having downwardly diverging side members resting on the sills and secured thereto, an endless belt arranged to run over the pulleys with its transverse intermediate portion supported onthe deck, a plurality of leg brackets including upright members resting on the sills and secured thereto, inturned intermediate horizontal members and upwardly'and outwardly inclined' upper members on the inner ends of the intermediate members and overlying the same,. brace members connecting the upright members of the leg brackets to the side members of the deck, guide rails secured to the brace members and extending under the upper members of the leg brackets and supporting the longitudinal edge portions of the belt upwardly inclined to the intermediate portion of the belt, bars resting on the upper members of the leg brackets: and secured thereto, and downwardly and inwardly inclined flexible members secured to said bars and withtheir lower longitudinal portions overlapping and restingon the upwardly inclined edge portions of the belt.

DANIEL F. PRZYBYLSKI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS.

Number Name Date 1,707,998 Shaw Apr. 9, 1929 2,430,282 Ensinger Nov; 4, I947 

